Search International and National Patent Collections

1. (WO2018122339) METHOD FOR PROCESSING A SIGNAL FROM A COHERENT LIDAR IN ORDER TO REDUCE NOISE AND RELATED LIDAR SYSTEM

Pub. No.:    WO/2018/122339    International Application No.:    PCT/EP2017/084754
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Fri Dec 29 00:59:59 CET 2017
IPC: G01S 17/32
G01S 7/491
G01S 7/481
Applicants: THALES
Inventors: PILLET, Grégoire
FENEYROU, Patrick
Title: METHOD FOR PROCESSING A SIGNAL FROM A COHERENT LIDAR IN ORDER TO REDUCE NOISE AND RELATED LIDAR SYSTEM
Abstract:
The invention relates to a method for processing (80) a signal from a coherent lidar comprising a coherent source (L), the method comprising steps consisting of: - generating (100, 110) a first beat signal (Sb1) and a second beat signal (Sb2), using respectively a first detection assembly (D1) and a second detection assembly (D2) - for a plurality of n time intervals (ti), determining (120) n respective values of spectral density (DSPi) using a transform in the frequency domain of the cross-correlation between the first and second beat signals, - determining (130) a mean value () of the spectral density using said n values of spectral density (DSPi), - determining (140) a piece of location information on the target using the mean value of said spectral density.